After school surprise

I was 18 years old , last year of High school, got off football practice and went home to do my normal routine. I was always alone because my mom worked nights. So when I wanted to jackoff , I really could do it with no worries of being caught. This one afternoon I got home had to go through back door because mom always locked front door and I had no key. I was in a hurry to get in and getting started on rubbing one out. As soon as I opened back door I started to undress, I kept a Hustler magazine under my bed and lube. I would lube up my hand and put it between my mattress and kneel by my bed and fuck my hand as I looked at magazine. Well everything was going as planned and I was about to cum when all of a sudden I felt something licking my ass hole, it scared the crap out of me until I noticed it was my neighbors dog, I must have left back door open and he came in to visit, after seeing it was him, I continued to fuck my hand, I would lube up both hands before I Cum so I could really get deep strokes while I blew my load. I kept feeling Sarge behind me and he kept trying to lick my ass, finally I stopped trying to keep him away and focused on fucking my hand. as Sarge found my asshole his tounge started darting in and out of my ass and it really felt awesome, I couldn’t believe I was letting this dog lick me while I stroked my cock. Didn’t take long before he jumped up on my back and stared humping me. I could feel his wet cock sliding between my legs and up and down my crack. I didn’t stop him because I was about to cum myself. Right when I was about to cum I really started fucking my fist hard with long strokes. As I was fucking my long strokes helped Sarge find his mark, his red slippery cock slid straight up my ass, he never slowed down, he knew he was in and he wasn’t about to be pushed off. He wrapped his paws around my stomach and started to pound his cock into me. It was a shock at first, but because I was about to cum also, as soon as he stared pounding me, I stared shooting my load harder than I ever have. Every time he would push his huge cock into me I would squirt again, when I finally stopped cumming, he was starting to slow a bit, but I could feel him growing inside me. His knot was then pushed up me and he forced it to stay, I could feel him shaking and pushing it farther and farther in my. Then I felt his cum, I could feel him pumping me full of his hot cum. I tried to slide him out, but the knot was huge. After about 10 minutes of his cum pumping in me, he finally pulled himself out of me and a loud splash sounded when all his cum ran out of me onto the floor. Sarge started licking my ass as his cum kept oozing out, He licked for what seams an hour: I was feeling amazing so I let him. Must have turned him on again because he started to jump on my back again and was trying to fuck me. This time I reached around and grabbed his hot wet cock and guided it in my awaiting ass, in hopes to feel him deep like before and make me cum like never before.

After that day, he visited my house everyday wanting more.